Which blockchains support x402? The three lists top answers merge into one
Which blockchains support x402? The three lists top answers merge into one There is no single list of blockchains that support x402. There are three…
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How Do I Get My Paid API Listed in the x402 Bazaar? You Can't Submit — You Settle
You can't submit your paid API to an x402 discovery index. We probed it — there is no endpoint for that. On October 2, 2026 , we surveyed about 20 x…
x402 vs MPP: Which Rail Should an AI Agent Pay On?
x402 vs MPP: which rail should an AI agent pay on? x402 and MPP are diverging, not converging. x402 is a family of on-chain payment schemes attached…
PCI SSC's AI Payments Guidance Is the Decision Gate, Officially
PCI SSC's AI Payments Guidance Is the Decision Gate, Officially In October 2026, the PCI Security Standards Council published additional guidance on…
What should an AI agent do when it hits its budget?
Give an agent a budget and sooner or later it reaches the edge of it. A research agent has spent 4.20 of its 5.00 USD cap, and the next step (one mo…
Ko-fi vs Patreon fees on a $3 gift, and why I built a third option anyway
I'm Kir, and I built Pennygood : simple monthly support pages, from $3/mo. Before building it I had to work out where Ko-fi and Patreon actually fit…
A contributor reward is a Stripe coupon and not a balance credit, because a balance credit does not clear the VAT
Munchable maintains its own product database, and the fastest way it grows is people scanning things we do not have yet. Point the camera at an ingr…
SEPA Direct Debit Core vs B2B: Developer Guide
Stripe, Adyen and GoCardless all support SEPA Direct Debit, but none of them will collect under the B2B scheme, and Mollie doesn't document it eithe…
Cloudflare Put a 402 Paywall Behind Every Domain. The Rail Was Never the Hard Part.
On 2026-09-30 Cloudflare opened a closed beta of its Monetization Gateway . It lets a domain owner charge agents per request over HTTP 402, settled…
iDEAL Wero: how far has the merchant migration really gone? (first dated point)
Dated: 2026-10-01 — census v1 07:12Z (static HTML) + v2 09:53–09:54Z (headless browser); incumbent checks 10:05–10:20Z. Pennyforge research artifact…
Mobile Payment Provider Abstraction from Day One
Build the wrapper before you have a paywall. Before paying users. Before you have finalised whether the paywall SDK behind it will be RevenueCat, Ad…
Settlement batches don't know about daylight saving time
Reconciliation broke twice a year for months before we found the pattern. Our settlement cutoff was defined as 23:00 local time, converted to UTC at…
I built a Pix library for Elixir (and one cent proved it works)
Over the last few months I became a bit of a compulsive open source contributor. Translating Linux kernel documentation into Portuguese, a merged PR…
Moving Carefully and Proving It: The Reality of Scaling Fintech Infrastructure
Building backend systems for fintech is fundamentally different from almost any other domain. The stakes are absolute, the edge cases are catastroph…
Missing Level 3 data added 180bps to a B2B card transaction
Reconciling a corporate card processing report for a B2B marketplace and noticed the effective rate on a chunk of transactions was way above what th…
Apple Pay Token Decryption vs Google Pay ECv2
Apple's own reference page for decrypting an Apple Pay token currently gets the key derivation wrong. The KDF table lists the hash function where th…
Card Decline Codes: Visa vs Mastercard Retry Rules
Visa now lets a merchant retry a soft-declined card up to 20 times in 30 days, not 15. The figure sits in Table 7-2 of the Visa Core Rules dated 18…
AgentWallex: Content Day (Articles going live)
The $65M Question: Why AI Agents Shouldn't Hold Private Keys Two weeks. $65M in funding. Catena raised $30M from a16z to build an "AI-native bank."…
Authorization holds expire before you think they will
Ran into this on a rental deposit flow: authorize at booking, capture at checkout, sometimes 10-12 days later. Visa releases an authorization hold a…
Why your order system and your payment provider disagree
Twice a month somebody in operations finds a number that doesn't match. An order recorded at €120.00 against a capture of €119.40. Or an order with…
Partial refunds break when there were multiple captures
Ran into this on an order that split into two captures: warehouse shipped half the items same day, the rest three days later. Two captures against o…
Best Telegram Monetization Platforms in 2026
Search for the best Telegram monetization platforms and you will usually see very different products grouped together as Telegram monetization tools…
Apple Pay or Google Pay silently failing on WooCommerce? Check these hidden problems
Apple Pay and Google Pay have a nasty failure mode: when something breaks, the problem may not be obvious from your normal WooCommerce logs. A shopp…
Reconcilation in Payment systems
Payment systems often look simple when everything is working. A user initiates a payment, the provider processes it, a webhook arrives, and the appl…
What a lost dispute actually costs a Connect platform
Refunds get the attention. Disputes are worse, and the reason is structural rather than a matter of degree. On a refund you at least have a paramete…
The Stripe Connect refund that only costs the platform
There is a class of bug in Stripe Connect that never throws, never logs, and never fails a webhook. The refund succeeds. The customer is made whole.…
One Payment, Three Ledgers: Where Reconciliation Actually Breaks
A processor says a payment settled. Your product ledger shows the customer balance and fee entries. The bank account still has no matching credit. N…
Never split the money on payment success
Here's a line of code that looks completely reasonable: the moment a buyer's card is charged, credit the vendor's share to their payout balance. It'…
Designing Transaction Monitoring Dashboards for FinTech Operations
Designing Transaction Monitoring Dashboards for FinTech Operations A payment system can return successful API responses while transactions remain pe…
TikTok explores peer-to-peer payments via DMs, report says
If rolled out, the feature would use the social media service’s TikTok Pay offering, which is already available in Southeast Asia for TikTok Shop pu…